SpaceX, Elon Musk's aerospace, satellite, and AI company, has finally gone public . Shares were priced at $135 each Thursday afternoon, making it the biggest initial public offering in history. The stock's early price bump on its first day of trading helped cement Musk as the world's first trillionaire. Joe Ciolli, executive editor and First Trade newsletter author, and Dan DeFrancesco, deputy executive editor and author of the Business Insider Today newsletter, sat down for a live Q&A to talk